Honeywell 38002 Enviracare Universal Replacement Pre-Filter
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Tools and Hardware Reviews of Honeywell 38002 Enviracare Universal Replacement Pre-Filter
Customer Review: Not "by Honeywell"
Summary: 1 Stars
Under the Amazon title are the words "by Honeywell". No. What I received was not "by Honeywell". It might be just as good. It might even be better. But, it is not "by Honeywell". One thing I noticed is the filter does not have the pre-cut lines for easy fitting to my particular air filter. It also seems denser which may make it pass through less air. Nice price, but I would have gone to Home Depot and bought the real thing had I only known the truth. So, be careful ordering from these Amazon merchants.Customer Review: Not Exactly "Universal"
Summary: 3 Stars
I bought this filter replacement for my "Honeywell 50100 Enviracaire Air Purifier." The filter came with scored lines and directions for cutting for each model, but they didn't work my air purifier, so I had to cut them myself, which was annoying since the filters are difficult to cut through.Customer Review: Not Honeywell
Summary: 1 Stars
They will not send you a Honeywell filter. These filters that I just received from Amazon are from a different manufacturer. This is a classic case of bait and switch. In legal terms, we call it FRAUD. The item appears as though it is of comparable quality. But it is clearly not a Honeywell brand product. If you are purchasing this based on your confidence in the Honeywell brand you will be disappointed; because you will not get the item that you pay for.Customer Review: Not Universal, Not Perforated
Summary: 1 Stars
This product is mislabeled. It's not perforated, so creating strips of different widths to fit different machines (i.e. universal) has to be done with scissors. What a mess! And in the end any deviation from a perfectly cut line destroys the filter. This was a useless waste of money and the distributor should be ashamed of their misleading description.Customer Review: Not enough Activated Carbon, variable results
Summary: 2 Stars
I received, as far as I can tell by the packaging, Honeywell products from this page's order. Some reviewers have mentioned receiving prefilters by manufacturers other than Honeywell. I have used both Honewell and other manufacturer's versions of this product, results seem similar for all.
The key seems to be the activated carbon component or lack thereof. Some of these prefilters seem almost non-effective to the point I've considered they might be just sprayed/colored black, and could be lacking (or highly under utilizing) any activated carbon. I am concerned about quality control here. The original filters were, at first, terrific, giving a thrilling improvement in my breathing. However, this result dissipated quickly, I suspect because of the surface area of the activated carbon being "used up" in having done it's job.
The "Universal Replacement" prefilters are less thick than the original prefilters, but increased thickness may not be the solution. I have tried doubling them. After a point, a certain thickness of the mesh prefilters is sufficient to collect particulates (dust, pollen, lint etc). The prefilter stops larger stuff, the inner, HEPA filter takes out smaller (specs say to .03 microns). But the porosity of the mesh prefilter must be balanced to let air come in while allowing an efficient quantity of air to come into contact with the activated carbon surface. Once the carbon is "used up" it is no longer effective. At that point the machine may still be filtering particulates, but no longer effects VOC's and other things for which the activated carbon is useful.
My solution is to change these prefilters very, very frequently (twice a week!). The prefilters have 2 jobs, but they cease to be usfull as active carbon components long before they stop being useful as larger particulate filters. It's fairly easy to feel the results. New prefilter = better breathing. I have reduced household contaminants/exposure. It's unlikely that there is an unusual out-gassing problem in my home. I have had similar difficulties at multiple venues.
To clean the air, the air must contact the carbon (this is why the noisy fans, an entire review issue in itself, are be necessary). I'm now researching units containing much larger amounts of activated carbon (like Austin Air HealthMate). My concern is the surface area of the activated carbon. Despite having 17 pounds of carbon in them, once the surface area of the carbon becomes coated with the contaminantes it removes, new air just passes over. Will I need to have a truckload of the carbon beads/rocks in the garage? Could a stirring mechanism/some way to clean/recycle the carbon beads be added? I'd love constructive responses.